Exceeding Temperature Rating of PVC Piping
Exceeding Temperature Rating of PVC Piping
(OP)
Recircing a well insulated chill water loop recently overnight resulted in loop temperature at 170 degrees F at probably 50-75 psi in a ten inch PVC pipe (part Schedule80 other part, 1120 sdr-26). It exceeded the 140 temp limit and even the 167 degree plastic point, and the piping bulged out and distorted (oval-egg shaped on the end of the pipe) at a Dresser coupling (to a steel pipe section) and at a separate flange. Does anyone know if there are any available thumbrules for estimating the suitability for service of this piping?
We are excavating now but I question whether the entire piping system must be replaced even in sections that have no readily visible distortion?
Thanks,
etcm
We are excavating now but I question whether the entire piping system must be replaced even in sections that have no readily visible distortion?
Thanks,
etcm





RE: Exceeding Temperature Rating of PVC Piping
THe fact that it is chilled water piping doesn't mean that it can run hot as you found out the hard way.
This happens in Agricultural installation a lot. People dead head irrigation pumps and wonder why the 3" pipe is now 6"
Clyde
RE: Exceeding Temperature Rating of PVC Piping
RE: Exceeding Temperature Rating of PVC Piping
Thanks,
etcm
RE: Exceeding Temperature Rating of PVC Piping